Fix typo in xlogdump usage() screen
Fix typo in xlogdump usage() screen

royc1/gpdb,tangp3/gpdb,Quikling/gpdb,lpetrov-pivotal/gpdb,yuanzhao/gpdb,rvs/gpdb,yuanzhao/gpdb,lintzc/gpdb,rubikloud/gpdb,xuegang/gpdb,yuanzhao/gpdb,kaknikhil/gpdb,yuanzhao/gpdb,atris/gpdb,xinzweb/gpdb,0x0FFF/gpdb,cjcjameson/gpdb,tangp3/gpdb,rvs/gpdb,randomtask1155/gpdb,ahachete/gpdb,greenplum-db/gpdb,zaksoup/gpdb,ahachete/gpdb,lintzc/gpdb,ahachete/gpdb,edespino/gpdb,atris/gpdb,xuegang/gpdb,xuegang/gpdb,cjcjameson/gpdb,chrishajas/gpdb,lpetrov-pivotal/gpdb,xinzweb/gpdb,foyzur/gpdb,Chibin/gpdb,cjcjameson/gpdb,kaknikhil/gpdb,lpetrov-pivotal/gpdb,lintzc/gpdb,rvs/gpdb,adam8157/gpdb,chrishajas/gpdb,atris/gpdb,tangp3/gpdb,greenplum-db/gpdb,cjcjameson/gpdb,Chibin/gpdb,xinzweb/gpdb,rubikloud/gpdb,jmcatamney/gpdb,lpetrov-pivotal/gpdb,randomtask1155/gpdb,foyzur/gpdb,royc1/gpdb,royc1/gpdb,zaksoup/gpdb,adam8157/gpdb,ahachete/gpdb,ashwinstar/gpdb,foyzur/gpdb,greenplum-db/gpdb,rubikloud/gpdb,lisakowen/gpdb,kaknikhil/gpdb,lisakowen/gpdb,zaksoup/gpdb,0x0FFF/gpdb,Chibin/gpdb,tangp3/gpdb,kaknikhil/gpdb,kaknikhil/gpdb,greenplum-db/gpdb,foyzur/gpdb,Chibin/gpdb,ashwinstar/gpdb,ashwinstar/gpdb,randomtask1155/gpdb,atris/gpdb,0x0FFF/gpdb,xuegang/gpdb,adam8157/gpdb,ahachete/gpdb,lpetrov-pivotal/gpdb,janebeckman/gpdb,rubikloud/gpdb,royc1/gpdb,janebeckman/gpdb,edespino/gpdb,xuegang/gpdb,Chibin/gpdb,edespino/gpdb,royc1/gpdb,yuanzhao/gpdb,Quikling/gpdb,edespino/gpdb,jmcatamney/gpdb,lisakowen/gpdb,Quikling/gpdb,ashwinstar/gpdb,cjcjameson/gpdb,jmcatamney/gpdb,0x0FFF/gpdb,cjcjameson/gpdb,rvs/gpdb,adam8157/gpdb,adam8157/gpdb,foyzur/gpdb,rubikloud/gpdb,50wu/gpdb,greenplum-db/gpdb,randomtask1155/gpdb,yuanzhao/gpdb,rvs/gpdb,xuegang/gpdb,edespino/gpdb,edespino/gpdb,rubikloud/gpdb,atris/gpdb,Chibin/gpdb,xuegang/gpdb,atris/gpdb,janebeckman/gpdb,Quikling/gpdb,Quikling/gpdb,tangp3/gpdb,ahachete/gpdb,zaksoup/gpdb,ashwinstar/gpdb,Chibin/gpdb,cjcjameson/gpdb,xinzweb/gpdb,xuegang/gpdb,lintzc/gpdb,kaknikhil/gpdb,edespino/gpdb,xinzweb/gpdb,ashwinstar/gpdb,rubikloud/gpdb,adam8157/gpdb,jmcatamney/gpdb,50wu/gpdb,janebeckman/gpdb,foyzur/gpdb,0x0FFF/gpdb,janebeckman/gpdb,lisakowen/gpdb,rvs/gpdb,atris/gpdb,Quikling/gpdb,0x0FFF/gpdb,greenplum-db/gpdb,Quikling/gpdb,foyzur/gpdb,randomtask1155/gpdb,adam8157/gpdb,adam8157/gpdb,50wu/gpdb,ashwinstar/gpdb,50wu/gpdb,edespino/gpdb,edespino/gpdb,cjcjameson/gpdb,CraigHarris/gpdb,Chibin/gpdb,randomtask1155/gpdb,chrishajas/gpdb,janebeckman/gpdb,royc1/gpdb,Quikling/gpdb,yuanzhao/gpdb,lpetrov-pivotal/gpdb,yuanzhao/gpdb,chrishajas/gpdb,rvs/gpdb,edespino/gpdb,lpetrov-pivotal/gpdb,xinzweb/gpdb,jmcatamney/gpdb,lintzc/gpdb,jmcatamney/gpdb,kaknikhil/gpdb,50wu/gpdb,lintzc/gpdb,kaknikhil/gpdb,CraigHarris/gpdb,jmcatamney/gpdb,tangp3/gpdb,randomtask1155/gpdb,50wu/gpdb,lisakowen/gpdb,yuanzhao/gpdb,greenplum-db/gpdb,yuanzhao/gpdb,rubikloud/gpdb,tangp3/gpdb,royc1/gpdb,jmcatamney/gpdb,Quikling/gpdb,lisakowen/gpdb,lisakowen/gpdb,Chibin/gpdb,randomtask1155/gpdb,zaksoup/gpdb,50wu/gpdb,rvs/gpdb,CraigHarris/gpdb,tangp3/gpdb,kaknikhil/gpdb,janebeckman/gpdb,CraigHarris/gpdb,janebeckman/gpdb,cjcjameson/gpdb,zaksoup/gpdb,ahachete/gpdb,zaksoup/gpdb,Chibin/gpdb,CraigHarris/gpdb,50wu/gpdb,janebeckman/gpdb,lpetrov-pivotal/gpdb,xuegang/gpdb,kaknikhil/gpdb,royc1/gpdb,CraigHarris/gpdb,chrishajas/gpdb,foyzur/gpdb,Quikling/gpdb,cjcjameson/gpdb,greenplum-db/gpdb,lintzc/gpdb,0x0FFF/gpdb,rvs/gpdb,chrishajas/gpdb,CraigHarris/gpdb,lisakowen/gpdb,chrishajas/gpdb,0x0FFF/gpdb,lintzc/gpdb,atris/gpdb,janebeckman/gpdb,ahachete/gpdb,CraigHarris/gpdb,zaksoup/gpdb,ashwinstar/gpdb,lintzc/gpdb,xinzweb/gpdb,chrishajas/gpdb,CraigHarris/gpdb,rvs/gpdb,xinzweb/gpdb